package com.zyh.web.admin;

import com.zyh.po.Tag;
import com.zyh.service.TagService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.web.PageableDefault;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.validation.Valid;

@Controller
@RequestMapping("/admin")
public class TagController {

    @Autowired
    private TagService tagService;

    @GetMapping("/tags")
    //Pageable根据前端页面构造自动封装 springboot默认提供分页封装的方法 10条数据 根据id 倒叙
    public String tags(@PageableDefault(size = 3,sort = {"id"},direction = Sort.Direction.DESC)
                                    Pageable pageable, Model model){
        model.addAttribute("page",tagService.listTag(pageable));
        return "admin/tags";
    }

    @GetMapping("/tags/input")//新增
    public String input(Model model){
        model.addAttribute("tag",new Tag());
        return "admin/tags-input";
    }

    @GetMapping("/tags/{id}/input")
    public String editInput(@PathVariable Long id, Model model){
        model.addAttribute("tag",tagService.getTag(id));
        return "admin/tags-input";
    }

    @PostMapping("/tags")//BindingResult result校验结果 @Valid检验
    public String post(@Valid Tag tag , BindingResult result, RedirectAttributes attributes){
        //判断是否重复
        Tag tag1 =tagService.getTagByName(tag.getName());
        if(tag1 !=null){
            result.rejectValue("name","nameError","不能添加重复的分类");
        }

        if(result.hasErrors()){
            return "admin/tags-input";
        }
        Tag t = tagService.saveTag(tag);
        if(t == null){
            attributes.addFlashAttribute("message","新增失败");
        }else {
            attributes.addFlashAttribute("message","新增成功");
        }
        return "redirect:/admin/tags";
    }

    @PostMapping("/tags/{id}")//BindingResult result校验结果 @Valid检验
    public String editPost(@Valid Tag tag , BindingResult result,@PathVariable Long id,RedirectAttributes attributes){
        //判断是否重复
        Tag tag1 =tagService.getTagByName(tag.getName());
        if(tag1 !=null){
            result.rejectValue("name","nameError","不能添加重复的分类");
        }

        if(result.hasErrors()){
            return "admin/tags-input";
        }
        Tag t = tagService.updateTag(id,tag);
        if(t == null){
            attributes.addFlashAttribute("message","更新失败");
        }else {
            attributes.addFlashAttribute("message","更新成功");
        }
        return "redirect:/admin/tags";
    }

    @GetMapping("/tags/{id}/delete")
    public String delete(@PathVariable Long id,RedirectAttributes attributes){
        tagService.deleteTag(id);
        attributes.addFlashAttribute("message","删除成功");
        return "redirect:/admin/tags";
    }

}
